/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2004 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "Apache BSF", "Apache", and "Apache Software Foundation"
 *    must not be used to endorse or promote products derived from
 *    this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many individuals
 * on behalf of the Apache Software Foundation and was originally created by
 * Sanjiva Weerawarana and others at International Business Machines
 * Corporation. For more information on the Apache Software Foundation,
 * please see <http://www.apache.org/>.
 */

package org.apache.bsf.util;

/**
 * An <code>ObjInfo</code> object is used by a compiler to track the name and
 * type of a bean.
 * 
 * @author   Matthew J. Duftler
 */
public class ObjInfo
{
  static private String QUOTE_CHARS = "\'\"",
						EXEC_CHARS  = "(=";
		 public  String objName;
		 public  Class  objClass;

  public ObjInfo(Class objClass, String objName)
  {
	this.objClass = objClass;
	this.objName  = objName;
  }
  public boolean isExecutable()
  {
	char[]  chars            = objName.toCharArray();
	char    openingChar      = ' ';
	boolean inString         = false,
			inEscapeSequence = false;

	for (int i = 0; i < chars.length; i++)
	{
	  if (inEscapeSequence)
	  {
		inEscapeSequence = false;
	  }
	  else if (QUOTE_CHARS.indexOf(chars[i]) != -1)
	  {
		if (!inString)
		{
		  openingChar = chars[i];
		  inString = true;
		}
		else
		{
		  if (chars[i] == openingChar)
		  {
			inString = false;
		  }
		}
	  }
	  else if (EXEC_CHARS.indexOf(chars[i]) != -1)
	  {
		if (!inString)
		{
		  return true;
		}
	  }
	  else if (inString && chars[i] == '\\')
	  {
		inEscapeSequence = true;
	  }
	}

	return false;
  }
  public boolean isValueReturning()
  {
	return (objClass != void.class && objClass != Void.class);
  }
  public String toString()
  {
	return StringUtils.getClassName(objClass) + " " + objName;
  }
}